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    • Where can I learn more about Consistency Points?
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/Where_can_I_learn_more_about_Consistency_Points
      Some questions regarding Common Consistency Point, it benefits, usage, types, and measures are answered in this article.
    • wafl.cp.toolong or high disk utilization on archive, backup, or disaster recovery nodes
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/wafl_cp_toolong_or_high_disk_utilization_on_archive_backup_or_disaster_recovery_nodes
      disk ut% xfers ureads--chain-usecs writes--chain-usecs cpreads-chain-usecs greads--chain-usecs gwrites-chain-usecs /data_aggr1/plex0/rg0: 0a.11.1 10 23.42 0.00 .... . 11.21 61.56 133 12.21 57.15 50 0....disk ut% xfers ureads--chain-usecs writes--chain-usecs cpreads-chain-usecs greads--chain-usecs gwrites-chain-usecs /data_aggr1/plex0/rg0: 0a.11.1 10 23.42 0.00 .... . 11.21 61.56 133 12.21 57.15 50 0.00 .... . 0.00 .... . 0a.10.1 11 23.80 0.00 .... . 11.66 59.25 147 12.14 57.37 55 0.00 .... . 0.00 .... . 1a.12.1 100 158.69 120.29 5.43 2299 10.26 34.39 553 28.15 9.93 839 0.00 .... . 0.00 .... . 0a.11.2 100 156.09 118.85 5.39 2253 9.96 34.97 553 27.28 10.05 794 0.00 .... . 0.00 .... . 0a.10.2 100…
    • "wafl.cp.toolong" message seen in ONTAP Logs during high disk workload
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/wafl_cp_toolong_message_seen_in_ONTAP_Logs_during_high_disk_workload
      High disk workload when the message is detected. Event visible in the "event log show" command output: ONTAP 9 or newer Example: Mon Dec 23 00:20:36 EST [FilerA: wafl_exempt08: wafl.cp.toolong:error]:...High disk workload when the message is detected. Event visible in the "event log show" command output: ONTAP 9 or newer Example: Mon Dec 23 00:20:36 EST [FilerA: wafl_exempt08: wafl.cp.toolong:error]: Aggregate fas_01_DATA_AGGR experienced a long CP... Mon Feb 22 16:14:08 CLT [FilerA: wafl_CP_proc: wafl.cp.toolong.warning:warning]: params: ... Mon Feb 22 16:14:08 CLT [FilerA: wafl_CP_proc: wafl.cp.slovol.warning:warning]: params: ... Latency in affected aggregate is usually detected.
    • Long Consistency Point "wafl.cp.toolong" when disk is about to fail or being failed
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/Long_Consistency_Point_wafl_cp_toolong_when_disk_is_about_to_fail_or_being_failed
      Tue Oct 31 12:34:10 +1100 [Cluter1_01: disk_server_0: disk.ioRecoveredError.retry:info]: Recovered error on disk 0c.10.6: op0x2f:b5e0b400:0400 sector 7 SCSI:recovered error - Disk used internal retry ...Tue Oct 31 12:34:10 +1100 [Cluter1_01: disk_server_0: disk.ioRecoveredError.retry:info]: Recovered error on disk 0c.10.6: op0x2f:b5e0b400:0400 sector 7 SCSI:recovered error - Disk used internal retry algorithm to obtain data (1 b 96 96) (2693) Disk 0c.10.6 Shelf 10 Drawer 1 Slot 6 Bay 6 [NETAPP 377_WVAXE10TA07 NA01] S/N [VHGUH40M] UID [5000CCA0:C82E5848:00000000:00000000:00000000:00000000:00000000:00000000:00000000:00000000]
    • Brocade CP blade not reachable via management port
      https://kb.netapp.com/on-prem/Switches/Brocade-KBs/Brocade_CP_blade_not_reachable_via_management_port
      CP blade Management (MGMT) Ethernet port CP blade not reachable via Management (MGMT) Ethernet port Bond interface down and eth0 shows NO-CARRIER: RX: bytes packets errors dropped overrun mcast : eth0...CP blade Management (MGMT) Ethernet port CP blade not reachable via Management (MGMT) Ethernet port Bond interface down and eth0 shows NO-CARRIER: RX: bytes packets errors dropped overrun mcast : eth0: <NO-CARRIER,BROADCAST,MULTICAST,SLAVE,UP> mtu 1500 qdisc mq master bond0 state DOWN qlen 1000 Supported link modes: 10baseT/Half 10baseT/Full Advertised link modes: 10baseT/Half 10baseT/Full drv probe link timer ifdown ifup rx_err tx_err tx_queued intr tx_done rx_status pktdata hw wol 0xffff8000
    • Synchronous SnapMirror resync fails with "CSS creation failed due to timeout"
      https://kb.netapp.com/on-prem/ontap/DP/SnapMirror/SnapMirror-KBs/Synchronous_SnapMirror_resync_fails_with_CSS_creation_failed_due_to_timeout
      Applies to ONTAP 9 SnapMirror Business Continuity (SMBC) SnapMirror Synchronous (SM-S) Consistency Point (CP) Issue Resync fails in Synchronous SnapMirror with the following error showing in the ems.l...Applies to ONTAP 9 SnapMirror Business Continuity (SMBC) SnapMirror Synchronous (SM-S) Consistency Point (CP) Issue Resync fails in Synchronous SnapMirror with the following error showing in the ems.log Thu May 07 11:05:08 CEST [h-netapp03-02: rpl_worker_main: callhome.syncsm.exception:notice]: Call home for SNAPMIRROR SYNCHORONOUS EXCEPTION: CSS creation failed due to timeout SnapMirror Business Continuity may leave snapshots on the source or destination volumes.
    • Are long Consistency Points (wafl.cp.toolong) normal?
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/Are_long_Consistency_Points_wafl.cp.toolong_normal
      If ONTAP is more idle, long CPs are expected to allow more priority for background work or write bursts. ONTAP 9.15.1 includes some enhancements so this background delay will be less, however this is ...If ONTAP is more idle, long CPs are expected to allow more priority for background work or write bursts. ONTAP 9.15.1 includes some enhancements so this background delay will be less, however this is not necessary to upgrade immediately for a fix due to being expected behavior. Mon Dec 23 00:20:36 EST [FilerA: wafl_exempt08: wafl.cp.toolong:error]: Aggregate fas_01_DATA_AGGR experienced a long CP... This message occurs when a WAFL(R) consistency point (CP) takes longer than 30 seconds.